Petrol
it can be used by not polluting the air and it is a safe gas for cars and the environment
Cars can run on Hydrogen gas, however the car's engine must be modified first.
nitrogen
Not in diesel or benzin but you can make GAS out of it and cars can drive on that
Nitrogen
Leaded gasoline.
freon
gasoline, diesel, CNG (compressed natural gas), Propane (forklifts-not normally cars), Hydrogen gas, coal/wood for steam powered cars.
The joke "Why do cars fart? Because they have gas!" is a play on words. When people are experiencing flatulence, it is referred to as "having gas". Cars run on a different type of gas, of course, but the point of the joke is that the same word is used for both.
petroleum is used for cars and for lawn mowers and lots more
It's nitrogen.